Our Process for Comparison:
The EnergyPlus model results for different versions of ASHRAE codes were obtained by running the PNNL models of different building types. The same inputs were used to generate the cove.tool results which were calibrated later to match the EnergyPlus Results. The results that follow indicate that cove.tool is on average within 5% of all EnergyPlus simulations. The weather files used were the representative city for each zone.
BUILDING TYPES:
Small Office
All cove.tool models are within 8.5% when compared to respective Energy Plus models.
The Fan loads for 2010 and 2013 ASHRAE models are approx. 50% less and 50% more for respective cove.tool models.
Medium Office
All cove.tool models are within 5% when compared to respective Energy Plus models.
Large Office
All cove.tool models are within 5% when compared to respective Energy Plus models.
The Equipment loads for ASHRAE 2007 and 2010 are 8% more than respective cov.tool models and ASHRAE 2013 is 10% more than 2013 cove.tool model.
Hotel
All cove.tool models are within 5% when compared to respective Energy Plus models.
Education
All cove.tool models are within 10% when compared to respective Energy Plus models.
the Fan loads for ASHRAE models are approx. 50% more than cove.tool models.
Hospital
All cove.tool models are within 5% when compared to respective Energy Plus models.
Apartment Mid-Rise
All cove.tool models are within 5% when compared to respective Energy Plus models.
The lighting loads for 2007 cove.tool is 70% more than ASHRAE model.
Apartment High-Rise
All cove.tool models are within 2% when compared to respective EnergyPlus models.